On the occasion of Pope Benedict's visit to Britain, Christians could benefit by revisiting Lord Acton’s legacy, and seeking in our own time to grapple with difficult questions, informed by love of God and neighbour, says Savi Hensman.

With sad predictability, the latest attempts to smear Peter Tatchell began before his documentary on the pope had been broadcast. But those Christians who attack him with questionable allegations need to answer the very real questions that he asks.